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Net Income (Loss) Per Share (Tables) | 12 Months Ended
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Dec. 31, 2012
Numerators and Denominators of Basic and Diluted Net Income (Loss) Per Share Computations | The following table presents the calculation of basic and diluted net income per share (in thousands, except per share amounts):
|  | December 31, |
|  | 2012 |  |  | 2011 |  |  | 2010 |
Net income (loss) (numerator) |  | $ | (10,937 | ) |  | $ | 8,779 |  |  | $ | (4,335 | )
Shares calculation (denominator): |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding — basic |  |  | 116,457 |  |  |  | 115,175 |  |  |  | 101,487 |
Effect of Dilutive Securities: |  |  |  |  |  |  |  |  |  |  |  |
Potential common stock relating to stock options, restricted stock units and ESPP |  |  | — |  |  |  | 1,252 |  |  |  | — |
Weighted averages shares outstanding — diluted |  |  | 116,457 |  |  |  | 116,427 |  |  |  | 101,487 |
Net income (loss) per share — basic |  | $ | (0.09 | ) |  | $ | 0.08 |  |  | $ | (0.04 | )
Net income (loss) per share — diluted |  | $ | (0.09 | ) |  | $ | 0.08 |  |  | $ | (0.04 | )

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- Definition Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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